Slate jig



Sept. 8, 1931.

5. J. KERRIGAN SLATE JIG Filed Nov. 8, 1929 Patented Sept. 8, 1931UNITED STATES STEPHEN :rosnrn KERRIGAN, or MAHANOY ILANE, PENNSYIiVANIA-SLATE JIG Application filed November 8, 1929. Serial K 105320.

The present invention has reference to slate jig screen designed for usein connection with coal jigs, the primary object of the invention beingto provide novel means for separating 6 slate from the coal.

An important object of the invention is to provide a slate jig screen soconstructed as to insure against the slate and coal passing thereover,clogging the slate openings, to

10 defeat the purpose of the invention.

A further object of the invention is to provide a jig screen of thischaracter which will act to separate the slate from the coal, upon bothmovements of the jig screen, eliminat- 1 ing any possibility of theslate passing from the jig screen with the coal.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, Without departing from the spirit of theinvention.

Referring to the drawings:

Figure 1 is a plan view of a jig screen constructed in accordance withthe invention.

Figure 2 is a longitudinal sectional view through the jig screen.

Figure 3 is a transverse sectional view taken on line 33 of Figure 1.

Referring to the drawings in detail, the device includes a body portionformedpreferably of a length of sheet metal, the same being indicatedgenerally by the reference character 5, the longitudinal edges thereofbelng extended upwardly defining lateral flanges 6 that act to confinethe material passing over the jig, to the jig screen, preventing thematerial from moving laterally from the ig screen.

The body portion 5 is provided with a plurality of elongated cut outportions or openings, the openings being arranged at an an gle to a linelongitudinally and centrally of the body portion, the openings beingalso arranged in rows transversely of the body portion.

As clearly shown by the drawings, the openings of one row extend at anangle reverse to the direction of the openings in the adjacent row, tothe end that the material passing over thebodyportionmust move over theopenings. 5 The openings are formed preferably by a stamping operation,the portions of the sheet metal adjacent to the openings, and formedduring the stamping of the openings, are bent upwardly as at 7 invertical lines and lateral- 69 1y at 8, so that tongues are provided,the tongues being so spaced from the body portion that the slate, owingto its comparatively thin or plate like structure, may find its wayunder the tongues and through the openings, the tongues acting as guidesto guide the slate to the openings.

Elongated openings 9 are formed in the body portion and are disposedtransversely of the body portion, between the rows of tongues 8. Theseopenings are also formed by a stamping operation, the portions of thesheet metal formed by the stamping machine, being indicated at 10defining tongues which are bent downwardly, as clearly shown by thedrawing, to guide the slate into the openings upon the reverse movementof the jig. Thus it will be seen that due to the construction shown anddescribed, slate passing over the body portion will be caught under thetongues 8, upon one movement of the jig screen to separate the slatefrom the coal which rolls over the tongues.

The slate which might be carried over the tongues 8, upon one movementof the jig screen, will upon the reverse movement of the jig screen,pass through the openings 9 and be separated from the coal.

It might be further stated that owing to the construction of thetongues, the wedged shaped corners at the inner edges of the tongues,are eliminated, to the end that the slate cannot clog and prevent theoperation of the device.

I claim:

A jig screen comprising a body portion formed of a length of sheet metalmaterial, the longitudinal side edges of the body portion being extendedupwardly providing lateral flanges, rows of tongues stamped from thesheet metal and extending upwardly from the body portion and laterallyover the openings formed by the stamping operation, said tonguesembodying vertical portions connecting the tongues of the body portion,the rows of tongues being spaced apart, said body portion havingtransversely disposed elongated openings defining downwardly extendedtongues, and certain of the ends of the first mentioned tongues beingdisposed near the last mentioned tongues to direct material thereto.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature.

STEPHEN JOSEPH KERRIGAN.

